Cut the drumstick into 2 inch pieces, finely chop the onions and green chillies. Now take a frying pan and pour the oil. When the oil is hot add the mustard seeds and let it crackle. Then add the cumin seeds and sauté till it turns golden brown. Then add the drumstick pieces and the cashew nuts and sauté for two minutes. Put in the ginger garlic paste, onions and green chillies. Sauté till the raw smell leaves and add turmeric, curry leaves and chilly powder. Sauté briefly and add salt to taste. Cook till the entire masala blends. Turn of the flame and set it aside. Now take a rice cooker and add the rice and pour in three cups of water. Put the drumstick gravy we just prepare and stir well. Cook till it’s done. When you make the drumstick gravy, add a little extra salt if you don’t put salt in your rice.